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- W1982181522 startingPage "1931" @default.
- W1982181522 abstract "n-Butyl orthotitanate, BT, polymerized in tetrahydrofuran, if irradiated by visible light, gives a new electron spin resonance absorption that is not found before irradiation. In the present work, three different polymers of BT were synthesized by adding tetramethyl phenylenediamine (TMPD), dimethyl phenylenediamine (DMPD), or phenylenediamine (PD), to the solution of BT. The polymers thus prepared were tested to see if they give a new esr signal when irradiated by visible light. The polymer to which 1 mol% of TMPD was added gave TMPD •+ when irradiated by visible light, but the TMPD •+ signal decayed after the irradiation was discontinued. This change, therefore, is reversible. The resonant position of every hyperfine splitting line of the TMPD •+ found in this polymer coincided with that of TMPD •+ in solution, but the relative intensity ratios and the line width of each line depended on the nuclear spin quantum number of the coupling nuclei. This can be interpreted by the restricted rotational motion of TMPD •+ in the polymer matrix. The contribution of the non-diagonal term to the spin relaxation time would explain this phenomenon. In the case of the polymer to which DMPD was added, a small amount of DMPD •+ seemed to be formed, but no radical was detected in the case of the polymer to which PD was added." @default.
- W1982181522 created "2016-06-24" @default.
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- W1982181522 creator A5035885802 @default.
- W1982181522 date "1988-08-01" @default.
- W1982181522 modified "2023-09-26" @default.
- W1982181522 title "Light-induced reversible ionization of tetramethylphenylenediamine in an inorganic polymer of n-butyl orthotitanate" @default.
- W1982181522 cites W1510913788 @default.
- W1982181522 cites W198772981 @default.
- W1982181522 doi "https://doi.org/10.1139/v88-311" @default.
- W1982181522 hasPublicationYear "1988" @default.
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